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Questions and Answers
What may cause sinus tachycardia?
What may cause sinus tachycardia?
- Sleep and hypoxemia
- Exercise and anxiety (correct)
- Thyrotoxicosis and hypovolemia
- Digitalis and diuretics
What is the normal range for the heart rate in a normal sinus rhythm?
What is the normal range for the heart rate in a normal sinus rhythm?
- More than 100 bpm
- 60–100 bpm (correct)
- 100–150 bpm
- Less than 60 bpm
What is the treatment for sinus bradycardia if no symptoms are present?
What is the treatment for sinus bradycardia if no symptoms are present?
- Administration of atropine
- No treatment is indicated (correct)
- Digitalis and diuretics
- Oxygen administration
What is the normal PR interval in both sinus tachycardia and sinus bradycardia?
What is the normal PR interval in both sinus tachycardia and sinus bradycardia?
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What may be used to treat sinus tachycardia caused by thyrotoxicosis?
What may be used to treat sinus tachycardia caused by thyrotoxicosis?
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Study Notes
Causes of Sinus Tachycardia
- Fever
- Infection
- Heart failure
- Dehydration
- Electrolyte imbalance
- Thyrotoxicosis
- Anxiety
- Pain
- Medications (e.g., beta-agonists, atropine)
Normal Heart Rate in Sinus Rhythm
- 60-100 beats per minute (bpm)
Treatment for Sinus Bradycardia
- No treatment necessary if no symptoms are present
- Monitor heart rate and adjust as needed
Normal PR Interval
- 120-200 milliseconds (ms) in both sinus tachycardia and sinus bradycardia
Treatment for Sinus Tachycardia Caused by Thyrotoxicosis
- Beta-blockers to control heart rate and symptoms
- Treatment of underlying thyrotoxicosis (e.g., radioactive iodine, medications, surgery)
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Description
Test your knowledge of cardiac dysrhythmias with this quiz. Identify normal sinus rhythm parameters and recognize dysrhythmias, such as sinus tachycardia, based on heart rate, rhythm, P waves, PR interval, and QRS complex characteristics.
